build: fix .text section address alignment

build: fix .text section address alignment

Some linkers verify that sections have a start address that is aligned
with the minimum alignment of that section.  Add extra padding to the
".text" section to ensure it is always aligned with the maximum
alignment of any section placed in ".text".

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Reported by: Ed Maste <emaste@FreeBSD.org>

(cherry picked from commit 3910de0dee216d5b5bf23cfa29bfc80d082b2ee7)